Project Overview:
The California Department of Transportation recently awarded
FCI North
a new $39 million project in Northern California, just south
of the Benicia/Martinez Bridge retrofit project completed
by FCI this past summer. This new contract is part of a large
four-contract project to construct a new toll bridge that
will carry northbound traffic over the Carquinez Strait from
Martinez to Benicia.
Both southbound and northbound traffic currently flow over
the western, retrofitted bridge, but when this project is
completed, the northbound traffic will be directed onto FCI's
new approach, through the new toll plaza, and onto the new
bridge. Southbound traffic will remain on the older bridge.
The project, which began on September 10, 2002, will take
northbound I-680 lanes from their current alignment north
to the new Benicia/Martinez Toll Plaza. The project focuses
on two main structures, the Mococo Bridge and the Mococo On-Ramp.
The project site consists of brackish marshlands and sits
between the Tessoro and Shell Oil Refineries as well as the
Rhodia Chemical Plant. In addition to Marina Vista Road, the
Mococo Bridge will cross seven sets of oil and gas pipelines
(both above and below ground), and two sets of railroad tracks.
I-680/Marina Vista
Project Photos:
Spring
2003
Aerial
Photo - July, 2003
What's New?
May 2003
Caltrans accepts redesign plans for frame one.
Upcoming summer work includes erecting the falsework and
casting the superstructure for both frames one and two.
April 2003
Foundation and substructure work is ongoing at the Mococo
Overcrossing; Crews are working on bents seven and eight.
Abutment nine will be completed this month.
February/March 2003
Casings at bents seven and eight, and abutment nine cast
in drilled hole (CIDH) are complete.
December 2002
Crews are installing sheet piling and the installation of
rock pad is underway.
November 2002
Stage 1 paving is completed and ready for traffic switch.
Project Features:
A 364-meter, 6-span, Mococo overhead bridge begins with 5
lanes and flares to 17 lanes at the new toll plaza with 8
spans of precast girders, supported on 54 large diameter
piles
5 retaining walls - 3 cast-in-place, pile-supported, 1 cast-in-place.
spread-footing, and 1 soil-nail retaining wall
A 64-meter on-ramp with 6 spans of cast-in-place slab
53,700 cubic meters of roadway excavation
59,800 cubic meters of lightweight embankment
17,600 tons of pavement
Project Related Links:
California Department of Transportation
http://www.dot.ca.gov/hq/esc/tollbridge/
New Benicia-Martinez Bridge
http://www.dot.ca.gov/hq/esc/tollbridge/Ben-Mar/NewBridge/ProjectOverview.html
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